Adsorption of thallium ion (Tl<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="mml24" display="inline" overflow="scroll" altimg="si23.gif"><mml:msup><mml:mrow/><mml:mrow><mml:mo>+</mml:mo><mml:mn>3</mml:mn></mml:mrow></mml:msup></mml:math>) from aqueous solutions by rice husk in a fixed-bed column: Experiment and prediction of breakthrough curves

Alalwan, Hayder A.; Abbas, Mohammed Nsaif; Abudi, Zaidun Naji; Alminshid, Alaa H.

doi:10.1016/j.eti.2018.07.001

Cited by 53 publications

(13 citation statements)

References 43 publications

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“…The results illustrated that with an increase in the bed height (from 1 to 7 cm), better efficiency of TI +3 removal is achieved. Specifically, an enhancement in the bed height from 1 to 7 cm raises the breakthrough and saturation points from 5 and 100 min to 52 and 700 min, respectively [390].…”

Section: Fixed Bed Experiments Scenariomentioning

confidence: 99%

“…Schematic diagram of dynamic (continuous) fixed-bed column system[390].One of the important parameters in the fixed bed operation process is the working bed height(depth), in terms of the solid amount used of the prepared biosorbent packed in the column. To investigate the influence of bed height on sorption processes, different bed heights are chosen with a constant flow rate and fixed pollutant concentration.…”

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confidence: 99%

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Insight on water remediation application using magnetic nanomaterials and biosorbents

Maksoud

Elgarahy

Farrell

et al. 2020

Coordination Chemistry Reviews

218

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Adsorption to date is the most effective and utilized technology globally to remove several pollutants in wastewater. In this approach, many adsorbents have been synthesized, tested and used for the elimination and separation of the contaminants such as radionuclides, heavy metals, dyes and pharmaceutical compounds both at lab and industrial scale. However, there are many challenges to adsorption processes such as reducing the high cost, through means of separation of suspending adsorbents to be used again, as well as the ease to synthesize. Two methods that have shown promising results and gained significant interest is that of magnetic nanomaterials and biosorbents due to their effective, safe, eco-friendly, low cost and low-energy intensive material properties. Magnetic nanomaterials act as efficient adsorbents due to their ease of removal of contaminants from wastewater using an applied magnetic field but also their advantageous surface charge and redox activity characteristics. On the other hand, biosorbents have a synergistic effect with their efficient adsorption capacity to remove contaminants, high abundance and participation in waste minimization, helping alleviate ecological and environmental problems. This review highlights, discusses and reports on the state-of-the-art of these two promising routes to adsorption and provides indications as to what are the optimum materials for utilization and insight into their efficiency, reusability and practicality for the removal of pollutants from wastewater streams. Some of the main material focuses are zero-valent iron, iron oxides, spinel ferrites, natural and waste-based biosorbents.

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Section: Fixed Bed Experiments Scenariomentioning

confidence: 99%

mentioning

confidence: 99%

Insight on water remediation application using magnetic nanomaterials and biosorbents

Maksoud

Elgarahy

Farrell

et al. 2020

Coordination Chemistry Reviews

218

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“…Various agricultural materials have been investigated for the preparation of activated carbon for pollutants removal from wastewater. The most commonly reported ones are rice husk [12][13][14], wheat bran [15][16][17], fly ash [18][19][20], cashew nutshell [21], water hyacinth ash [22], sawdust [23,24], soybean shell [14,25], eggshell [26,27], medlar seed [28] coconut shell [29,30], palm kernel shell [31,32], and corn cob [14].…”

Section: Introductionmentioning

confidence: 99%

WITHDRAWN: Packed Bed Column Adsorption of Phenol Onto Corn Cob Activated Carbon: Linear and Nonlinear Kinetics Modeling

Chiedozie

Iheanacho

Nwabanne

et al. 2020

Preprint

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In the present study, linear and nonlinear regression analysis for packed bed column adsorption of phenol onto corn cob activated carbon was investigated. The activation of the corn cob provided the activated carbon with enhanced surface area and micropore volume of 903.7m2/g and 0.389 cm3/g respectively. The analysis of the physical properties of the corn cob activated carbon (CCAC) revealed that it contained 33.47% of fixed carbon. SEM images indicated the presence of interspatial pores within the matrix of the adsorbent, while the FTIR analysis revealed that the major functional groups in CCAC were alkanol, alkanes, alkyls, carboxylic acids, ethers, esters, and nitro compounds. The effect of the process parameters influencing the dynamic adsorption process was investigated at flow rates (9 – 18mg/min), initial phenol concentration (100-300mg/l), bed height (5 – 10cm), and particle size (300-800µm). Breakthrough time and adsorption capacity increased with an increase in bed height but decreased with an increase in flow rate, initial phenol concentration, and particle size. At 9mg/min flow rate, 100mg/l initial phenol concentration, 10 cm bed height, and 300µm, the breakthrough and saturation points adsorption capacities were 2.143 and 8.570 mg/g respectively, the volume of effluent treated at saturation point was 12.96L, the length of mass transfer zone (MTZ) was 7.50cm, while 66.13% phenol removal efficiency was achieved. The linear and nonlinear regression analysis of the dynamic column adsorption models viz. Thomas, Adam Bohart, and Wolborska fitted better with the experimental data as compared to Yoon–Nelson. Generally, the nonlinear regression analysis proved to be a better tool for dynamic adsorption model analysis because the model parameters it predicted are in higher proximity to the experimental data when compared to those obtained via linear regression analysis. Conclusively, this study has shown that CCAC can successfully be used for the removal of phenol from aqueous solutions. It also provided experimental evidence that for a more accurate analysis of dynamic adsorption models nonlinear regression tool should be considered.

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“…striata with NaOH activation for Hg(II) adsorption using fixed-bed columns. The Thomas model was used in this study for a breakthrough curve study because the model is broadly used for assessing breakthrough curves (Alalwan et al 2018). Finally, the adsorption capacity (q 0 ) and the Thomas rate constant (k T ) will be determined.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Mercury(II) using Activated Produced from Bambusa vulgaris var. striata in a Fixed Bed Column

Mistar¹,

Hasmita²,

Alfatah³

et al. 2019

JSM

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Pollution by mercury dissolved in aqueous media causes a crucial problem for health and environment. In this study, activated carbon from Bambusa vulgaris var. striata was produced by chemical activation using NaOH for mercury adsorption. The effects of mercury initial concentrations namely 50 and 100 mg/L on the breakthrough characteristics of the adsorption process were defined. The mechanism of the adsorption process through the fixed-bed column was fitted to the Thomas model. The activated carbon was characterized by scanning electron microscopy and energy-dispersive X-ray spectroscopy. The adsorption study with a continuous system and using the Thomas model showed that the highest adsorption capacity (q 0) of mercury ions is 218.08 mg/g. It can be concluded that activated carbon from Bambusa vulgaris var. striata has a great potential to act as an adsorbent to remove mercury from water.

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Adsorption of thallium ion (Tl+3) from aqueous solutions by rice husk in a fixed-bed column: Experiment and prediction of breakthrough curves

Cited by 53 publications

References 43 publications

Insight on water remediation application using magnetic nanomaterials and biosorbents

Insight on water remediation application using magnetic nanomaterials and biosorbents

WITHDRAWN: Packed Bed Column Adsorption of Phenol Onto Corn Cob Activated Carbon: Linear and Nonlinear Kinetics Modeling

Adsorption of Mercury(II) using Activated Produced from Bambusa vulgaris var. striata in a Fixed Bed Column

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